How deep are competition pools?

Can you use boiled water for nasal irrigation? How much does surfing lessons cost? Is water trampoline safe to use and where to buy it? What product do you use to put in mop water? Why can't you use table salt instead of pool salt in a salt water pool? When you add sand to water why does the sand settle at the bottom of the water? Why are the walls on your plaster pool rough? How do you destabilize pool water? What works best to seal stone coping around swimming pool to stop flaking? Does muriatic acid lower pH in pool water? Did the Aztecs land filled lake texcoco? Is it ok if skimmer is not slurping when pump is on? How much energy is in one gallon of water? How did water polo start? How does a DE filter work on a pool? What is hydrodivertion? What is the correct answer of my mother ......every morning.swim? Can a hot tub be installed on a flat roof? Why would water stop flowing and not return for ten minutes or more? How much water does a 22ft x 48 inch pool hold?